diff --git a/rtdata/images/svg/draw-horizontal.svg b/rtdata/images/svg/draw-horizontal.svg
new file mode 100644
index 000000000..ae8fa8c44
--- /dev/null
+++ b/rtdata/images/svg/draw-horizontal.svg
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   sodipodi:docname="draw-horizontal.svg"
+   inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
+   inkscape:export-ydpi="96"
+   inkscape:export-xdpi="96"
+   inkscape:export-filename="/tmp/template.png"
+   id="SVGRoot"
+   version="1.1"
+   viewBox="0 0 24 24"
+   height="24px"
+   width="24px">
+  <sodipodi:namedview
+     inkscape:document-rotation="0"
+     inkscape:snap-bbox-midpoints="false"
+     inkscape:snap-grids="true"
+     inkscape:object-nodes="false"
+     inkscape:snap-others="false"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-bbox="true"
+     inkscape:pagecheckerboard="false"
+     inkscape:grid-bbox="true"
+     inkscape:window-maximized="1"
+     inkscape:window-y="0"
+     inkscape:window-x="0"
+     inkscape:window-height="1041"
+     inkscape:window-width="1920"
+     showgrid="true"
+     inkscape:current-layer="layer1"
+     inkscape:document-units="px"
+     inkscape:cy="11.139546"
+     inkscape:cx="10.622929"
+     inkscape:zoom="20"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0"
+     borderopacity="1.0"
+     bordercolor="#666768"
+     pagecolor="#E0E1E2"
+     id="base">
+    <inkscape:grid
+       dotted="false"
+       empspacing="11"
+       originy="1"
+       originx="1"
+       id="grid1374"
+       type="xygrid" />
+  </sodipodi:namedview>
+  <defs
+     id="defs815" />
+  <metadata
+     id="metadata818">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Lawrence</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:rights>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:rights>
+        <dc:description>RawTherapee icon.</dc:description>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       sodipodi:nodetypes="cccc"
+       id="path831"
+       d="m 9,12 3,3 -4.5,1.5 z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path833"
+       d="m 10.5,10.5 3,3 L 21,6 18,3 Z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="cc"
+       id="path835"
+       d="M 19.5,19.5 H 4.5"
+       style="opacity:0.9;fill:none;stroke:#2a7fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+  </g>
+</svg>
diff --git a/rtdata/images/svg/draw-vertical.svg b/rtdata/images/svg/draw-vertical.svg
new file mode 100644
index 000000000..4613d95c6
--- /dev/null
+++ b/rtdata/images/svg/draw-vertical.svg
@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   sodipodi:docname="draw-vertical.svg"
+   inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
+   inkscape:export-ydpi="96"
+   inkscape:export-xdpi="96"
+   inkscape:export-filename="/tmp/template.png"
+   id="SVGRoot"
+   version="1.1"
+   viewBox="0 0 24 24"
+   height="24px"
+   width="24px">
+  <sodipodi:namedview
+     inkscape:document-rotation="0"
+     inkscape:snap-bbox-midpoints="false"
+     inkscape:snap-grids="true"
+     inkscape:object-nodes="false"
+     inkscape:snap-others="false"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-bbox="true"
+     inkscape:pagecheckerboard="false"
+     inkscape:grid-bbox="true"
+     inkscape:window-maximized="1"
+     inkscape:window-y="0"
+     inkscape:window-x="0"
+     inkscape:window-height="1041"
+     inkscape:window-width="1920"
+     showgrid="true"
+     inkscape:current-layer="layer1"
+     inkscape:document-units="px"
+     inkscape:cy="11.139546"
+     inkscape:cx="10.622929"
+     inkscape:zoom="20"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0"
+     borderopacity="1.0"
+     bordercolor="#666768"
+     pagecolor="#E0E1E2"
+     id="base">
+    <inkscape:grid
+       dotted="false"
+       empspacing="11"
+       originy="1"
+       originx="1"
+       id="grid1374"
+       type="xygrid" />
+  </sodipodi:namedview>
+  <defs
+     id="defs815" />
+  <metadata
+     id="metadata818">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Lawrence</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:rights>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:rights>
+        <dc:description>RawTherapee icon.</dc:description>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       sodipodi:nodetypes="cccc"
+       id="path831"
+       d="m 9,12 3,3 -4.5,1.5 z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path833"
+       d="m 10.5,10.5 3,3 L 21,6 18,3 Z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="cc"
+       id="path835"
+       d="m 4.5,4.5 v 15"
+       style="opacity:0.9;fill:none;stroke:#2a7fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" />
+  </g>
+</svg>
diff --git a/rtdata/images/svg/draw.svg b/rtdata/images/svg/draw.svg
new file mode 100644
index 000000000..308e15654
--- /dev/null
+++ b/rtdata/images/svg/draw.svg
@@ -0,0 +1,112 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   sodipodi:docname="draw.svg"
+   inkscape:version="1.0 (4035a4fb49, 2020-05-01)"
+   inkscape:export-ydpi="96"
+   inkscape:export-xdpi="96"
+   inkscape:export-filename="/tmp/template.png"
+   id="SVGRoot"
+   version="1.1"
+   viewBox="0 0 24 24"
+   height="24px"
+   width="24px">
+  <sodipodi:namedview
+     inkscape:document-rotation="0"
+     inkscape:snap-bbox-midpoints="false"
+     inkscape:snap-grids="true"
+     inkscape:object-nodes="false"
+     inkscape:snap-others="false"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-bbox="true"
+     inkscape:pagecheckerboard="false"
+     inkscape:grid-bbox="true"
+     inkscape:window-maximized="1"
+     inkscape:window-y="0"
+     inkscape:window-x="0"
+     inkscape:window-height="1041"
+     inkscape:window-width="1920"
+     showgrid="true"
+     inkscape:current-layer="layer1"
+     inkscape:document-units="px"
+     inkscape:cy="11.139546"
+     inkscape:cx="10.622929"
+     inkscape:zoom="20"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0"
+     borderopacity="1.0"
+     bordercolor="#666768"
+     pagecolor="#E0E1E2"
+     id="base">
+    <inkscape:grid
+       dotted="false"
+       empspacing="11"
+       originy="1"
+       originx="1"
+       id="grid1374"
+       type="xygrid" />
+  </sodipodi:namedview>
+  <defs
+     id="defs815" />
+  <metadata
+     id="metadata818">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Lawrence</dc:title>
+          </cc:Agent>
+        </dc:creator>
+        <dc:rights>
+          <cc:Agent>
+            <dc:title />
+          </cc:Agent>
+        </dc:rights>
+        <dc:description>RawTherapee icon.</dc:description>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Layer 1"
+     inkscape:groupmode="layer"
+     id="layer1">
+    <path
+       sodipodi:nodetypes="cccc"
+       id="path831"
+       d="m 9,12 3,3 -4.5,1.5 z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+    <path
+       sodipodi:nodetypes="ccccc"
+       id="path833"
+       d="m 10.5,10.5 3,3 L 21,6 18,3 Z"
+       style="opacity:0.7;fill:#2a7fff;fill-opacity:1;stroke:none;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1" />
+  </g>
+</svg>
diff --git a/rtgui/perspective.cc b/rtgui/perspective.cc
index 1b1672914..1d72011fa 100644
--- a/rtgui/perspective.cc
+++ b/rtgui/perspective.cc
@@ -40,6 +40,10 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
     EvPerspRender = mapper->newEvent(TRANSFORM);
     lens_geom_listener = nullptr;
 
+    Gtk::Image* ipers_draw_horiz = Gtk::manage (new RTImage ("draw-horizontal.png"));
+    Gtk::Image* ipers_draw_vert = Gtk::manage (new RTImage ("draw-vertical.png"));
+    Gtk::Image* ipers_draw = new RTImage ("draw.png");
+
     Gtk::Image* ipersHL =   Gtk::manage (new RTImage ("perspective-horizontal-left-small.png"));
     Gtk::Image* ipersHR =   Gtk::manage (new RTImage ("perspective-horizontal-right-small.png"));
     Gtk::Image* ipersVL =   Gtk::manage (new RTImage ("perspective-vertical-bottom-small.png"));
@@ -110,22 +114,25 @@ PerspCorrection::PerspCorrection () : FoldableToolPanel(this, "perspective", M("
 
     // Begin control lines interface.
     lines_button_h = Gtk::manage (new Gtk::ToggleButton());
+    lines_button_h->set_image(*ipers_draw_horiz);
     lines_button_h->signal_toggled().connect(sigc::bind(sigc::mem_fun(
             *this, &::PerspCorrection::linesButtonPressed), lines_button_h));
 
     lines_button_v = Gtk::manage (new Gtk::ToggleButton());
+    lines_button_v->set_image(*ipers_draw_vert);
     lines_button_v->signal_toggled().connect(sigc::bind(sigc::mem_fun(
             *this, &::PerspCorrection::linesButtonPressed), lines_button_v));
 
     lines_button_edit = Gtk::manage (new Gtk::ToggleButton());
+    lines_button_edit->set_image(*ipers_draw);
     lines_button_edit->signal_toggled().connect(sigc::mem_fun(
             *this, &::PerspCorrection::linesEditButtonPressed));
 
     lines = new ControlLineManager();
     lines->callbacks = new LinesCallbacks(this, lines);
 
-    img_ctrl_lines_apply = NULL;
-    img_ctrl_lines_edit = NULL;
+    img_ctrl_lines_apply = new RTImage ("tick.png");
+    img_ctrl_lines_edit = ipers_draw;
 
     Gtk::HBox* control_lines_box = Gtk::manage (new Gtk::HBox());
     control_lines_box->pack_start(*lines_button_v);